Another cover for the Christmas tree light.
One is a hollow design @0.35mm thickness. You will probably need a brim or raft.
The others are solid, s...o print with 2 shells, no infill. You will have to drill a hole in the bottom or print with no initial layers (which is a bad idea IMO).
Edit: Probably need scaling up by 15% (ish). You may get an error depending upon slicer. Its the slicer. No need for supports if you have a decent printer,